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在大田条件下研究了树脂包膜控释肥(CRF)和硫包膜控释肥(SCF)对夏玉米产量、田间氨挥发及氮肥利用率的影响.结果表明:控释肥能显著提高玉米产量.在相同施肥量(N、P、K量相同)情况下,全量控释肥CRF(1428 kg.hm-2)和SCF(1668 kg.hm-2)分别比全量普通复合肥CCF(1260 kg.hm-2)增产13.15%和14.15%;控释肥施肥量减少25%(CRF1071 kg.hm-2;SCF 1251 kg.hm-2)时,分别比CCF增产9.69%和10.04%;控释肥施肥量减少50%时(CRF 714 kg.hm-2;SCF 834 kg.hm-2),其产量与CCF无显著差异.对夏玉米田间土壤原位氨挥发进行研究表明,控释肥处理氨挥发速率上升缓慢,最大挥发高峰出现时间比普通肥处理晚7 d,土壤氨挥发量在0.78~4.43 kgN.hm-2,比普通肥处理(9.11 kgN.hm-2)减少51.34%~91.34%.控释肥的氮肥利用率和农学效率也均显著高于普通肥处理.
The effects of resin coated controlled release fertilizer (CRF) and sulfur coated controlled release fertilizer (SCF) on summer maize yield, field ammonia volatilization and nitrogen use efficiency were studied under field conditions. The results showed that controlled release fertilizer could significantly increase corn (1428 kg.hm-2) and SCF (1668 kg.hm-2) were higher than those of CCF (1260 kg, respectively) increased by 13.15% and 14.15% respectively. When controlled release fertilizers were reduced by 25% (CRF1071 kg.hm-2; SCF 1251 kg.hm-2), the yield was increased by 9.69% and 10.04% The results showed that there was no significant difference between CCF and yield of fertilizers when the amount of fertilizer was reduced by 50% (CRF 714 kg.hm-2; SCF 834 kg.hm-2) The ammonia volatilization rate increased slowly and the maximum volatilization peak appeared 7 days later than normal fertilizer treatment. The ammonia volatilization amount was 0.78 ~ 4.43 kgN.hm-2, decreased by 51.34% ~ 9.49 kgN.hm- 91.34% .The controlled release fertilizer nitrogen utilization efficiency and agronomic efficiency were also significantly higher than ordinary fertilizer treatment.